Wood bending and hardening machine.



M. s. E. ANDUAGA an H. BOURRELLY.

WOOD BENDING AND HARDEN ING MACHINE.

A PPLIOATION FILED MAB.v 31, 1910. 966,983. Patented Aug. 9, 1910.

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ATTORNEYS M. s. E. ANDUAGA& H. BOURRELLY.

WOOD BBNDING ANDHARDENING MACHINE. APPLICATION FILED MAR. 31, 1910.

966,983. Patented Aug. 9,1910

M [l |"l' H II IHH HMIHIHI'I ATTORNEYS M. $.11. ANDUAGA & H. BOURRELLY.WOOD BENDING AND HARDBNIN'G MACHINE. AIPLIOATION I'ILED 11,5.113 1.i910.

Patented Aug. 9,1910.

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NTED STATES PATENT OFFICE.

MANUEL S. ESPINOSA ANDUAGrA AND HENRI BOURRELLY, 0F LIMA, PERU.

WOOD IBEN'DING AND HARDENING- MACHINE.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application filed March 31, 1910. Serial No. 552,627.

To all whom it may concern:

Be it known that we, MANUEL S. ESPINOSA ANDUAGA and HENRI BOURRELLY,citizens, respectively, of the Republics of Peru and France, andresidents of Lima, Peru, South America,have invented anew and ImprovedWood Bending and Hardening Machine, of which the following is a full,clear, and exact description.

Among the principal objects which the present invention has in view are:to provide a method for bending wood and setting the same in bendedshape; to provide a machine for successively and continuously operatingto bend and set wood strips singly or in groups; to provide suitablemeans for feeding wood strips under pressure between rollers disposed togradually bend the strips to a desired curvature; and to provide adurable, powerful and eflicient construction for a machine of thecharacter specified.

One embodiment of the present inventionis disclosed in the structureillustrated in the accompanying drawings, in which like characters ofreference denote corresponding parts in. all the views, and in whichFigure 1 is a side elevation of a machine constructed in accordance withthe present invention, illustrated in conjunction with a wood stripbeing treated; Fig. 2 is a plan view of the same; Fig. 3 is alongitudinal vertical section on enlarged scale and in diagrammaticform, taken on the line 33 in Fig. 2; Fig. 4 is a vertical cross sectionof the construction illustrated in Fig. 3, taken 011 the line i-4= insaid figure, and Fig. 5 is a detail View in vertical. cross sectiontaken on the line 5-5 in Fig. 3.

It is well known that heretofore wood timbers have been shaped, bent andformed in steam chambers and in heated water baths, either clear orholding in solution some suitable salt. The timbers have been held informs or frames in stationary position in the said baths until they havebecome set. Among the objections urged against the process andmechanism, has been the fact that considerable time is consumed inpermitting the timbers to remain in the bath, and the further objectionthat the machines necessary for the handling of the product have beenlarge and expensive.

It is the purpose of the present invention to overcome the objectionsabove mentioned, which is herein accomplished by introducing thevwoodtimbers A between two series of rollers 6, 6 and 7, 7. The timber isforced between the two series of rollers 6, 6 and 7, 7 by heavycorrugated feed rollers 8 and 9. The rollers 6, 6 are journaled inbearing boxes 12, 12, pivotally connected at the lower end of pressurescrews 1O, 10. The heads of the screws 10, 10 are provided withperforations 11, 11 adapted to receive a winch bar for turning the saidscrews. The rollers 7, 7 are mounted in bearing boxes 13, 13, theforward ends of which are provided with bearings for trunnions 14, 14 ofthe said rollers, while the outer ends are perforated and adapted toreceive the threaded portion of screws 15, 15. The screws 15, 15 areprovided with head blocks having perforations 16, 16 similar to theperforations 11, 11 to receive the same winch bar or lever used forsetting up the screws 10, 10. In this position the rollers 7, 7 are soarranged that the first two rollers 6, 6 of the bending series aredisposed in vertical line passing between the adjacent soaces betweenthe first three of the rollers 7, 7. The third of the series 6, 6 isdisposed on a radial line between the last two of the series 7, 7. Thedisposition of the two series of rollers wherein the rollers of theupper series are disposed to exert a pressure between the rollers of thelower series, results in a better gripping action on the part of thesaid rollers on the interposed wood. The casing in which the saidrollers are mounted is provided with an upper and a lowerchamber toprovide horizontal upper walls 17,17, through which the screws 15, 15are extended, and are rotatively mounted therein. The'screws 15, 15 aresecured in the bed plate of the machine by a groove 18 formed in thesaid screw to receive a tapered pin driven from the outer wall of thecasing to impinge the said groove tangentially. The same form ofconnection between the screws 10, 10 and the bearing blocks 12 12exists. (See Fig. 4 of the drawingsj In front of the series of rollers6, 6 and 7 7 are mounted the rollers 8 and 9. The surfaces of the saidrollers are corrugated, as shown in Fig. 3 of the drawings. Thecorrugations are so formed that the crowns of the teeth thereof areembedded slightly in the surface of the wood when being treated. Therollers 8 and 9 are of equal width but of a larger diameter thantherollers 6 and 7.

The roller 9 is mounted in bearing blocks 19, 19 fixedly mounted in theside of the casing 20. The blocks 19 are so. arranged that-the center ofthe roller 9 is, in a vertical plane advanced somewhat in front of thecenter of the roller 8. The roller 8 is mount-- ed in bearing blocks 21,21, which are sli'd ably mounted in recesses 22, 22 formed in the upperside of the casing 20. Pivotally connected with the blocks 21, 21 arepressure screws 23, 23, the pivotal connection between the said blocksand screws being formed by a pin 24 driven through a perforation formedin the said blocks and passing tangentially through an annular groove 25formed in the lower end of each of the said screws. A cir cular recessis formed in the upper body of the said blocks 21, 21. The blocks 21,21form bearings for trunnions 26, 26 extended from the ends of the roller8. The pressure screws 23 are provided at the upper end thereof withheavy heads 27, 27 which are perforated at 28, 28 to receive a winch barwhere by the same are turned. The roller 8 is an idler. The roller 9 isthe driving member of the machine. The roller 9 is driven by a drivingpulley 29 and a bolt 30, the same transmitting from any suitable sourceof power.

The casing 20 is elongated to form a rearward extension 31. Theextension 31 is providedat the end removed from the rollers 6 and 7 withan opening 32 wherein are inserted the timbers A, A. The casing 20 is soconstructed as to contain water therein. In practice, a heating system,located either in or outside of the casing 20, is employed, said systemnot being shown in the accompanying drawings. The water employed in Vthe present described method of bending is heated, whether in or outsideof the said casing. As above stated, the water employed may beimpregnated with a suitable salt, or used in its natural condition.Somewhat dependent upon the heat and the salt employed is the speed withwhich the roller 9 is driven, and the timbers thereby passed between thebending rollers 6, 6 and 7, 7. Connected with the water space of theeasing 20, and extended from the side thereof, is a glass water columngage 33, wherein is exposed the surface level ofthe water held in thecasing 20. Connected with the water space so as to receive the directheat thereof, and mounted upon the side of the casing 20, is athermometer 34:. The said thermometer is used to show the variation inthe heat of the water contained in the said casing.

To operate the machine illustrated in the accompanying drawings, and tocarry out the method of bending'herein described, the lower portion ofthe casing 20 is filled with water, in its natural condition or as abrine, heated to the desired degree. The rollers 6, 6 and 7, 7 areadjusted by turning the screws 10, l0 and 15, 15, said adjustment be ingset by a model inserted between the said rollers, or by scales provided.The model referred to may be previously bent or formed by bending theinitial timbers. The timbers A, A are then introduced through theopening 32 in the extension 31 of the casing 20, and advancedtherethrough in the path therein provided, until the forward endimpinges upon the roller 9. The roller 9 lifts the impinging end of thetimber until the same passes over the top of the said roller. In thuspassing over the top of the roller 9 the upper side of the timber isbrought in contact with the lower side of the roller 8. The roller 8 isnow adjusted, by means of the winch bar placed in the perforations 28,in such manner as to set the screws 23 down to cause the corrugations ofthe rollers 8 and 9 to bite into the surface of the timber therebetween.The continuance of the rotation of the roller 9 now gradually butcontinuously, advances the timber A. In thus advancing, the end of thetimber impinges upon and over-rides the first of the series of rollers7. The disposition of the upper surface of the roller 7, the uppersurface of the roller 9, and the lower edge of the opening 32 is such asto impose a bending strain upon the said timber. Progressing over thefirst of the rollers 7 the end of the timber is next extended under thefirst of the rollers 6. If the roller 6 be not adjusted to bear upon thesaid timber, this is corrected by setting down the screw 10 and thebearing blocks 12, 12 carrying the said roller. The timber is now forcedforward, progressively passing between the second roller 7 and thesecond roller 6, the third roller 7 and the second roller 6, the fourthroller 7 and the third roller 6, and the fifth roller 7 and the thirdroller 6. If the rollers are disposed in the position shown in Fig. 3 ofthe drawings, the result on the timbers A will be that the same are bentas illustrated in the said figure of the drawings. When the timbers aredelivered from the opening 35 in the casing 20, they are carried tosuitable drying or setting room to be allowed to naturally set or to beanchored in the desired shape and so held until thoroughly dried.

In Figs. 2 and 4 of the drawings the timbers A, A, being treated, areillustrated as passing through the rollers in clusters. In the presentdrawings the cluster is shown as four timbers. It will be understoodthat any number of timbers may be passed through the machinesimultaneously, within the limits of the spread of the rollers 6, 6.

It will be apparent from the foregoing description taken in connectionwith the drawings, that the wood is not only bent, but is also seasonedand hardened, as it is passed through the machine.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent is l. A wood bending machine, comprising anelongated chamber containing a suitable liquid; a plurality of opposedguide rollers mounted in said chamber at the delivery end thereof; meansfor adjusting said rollers to form a curved passage between saidrollers; and means for forcing timbers through said passage.

2. A wood bending machine, comprising an elongated chamber containing asuitable liquid; a plurality of guide rollers oppositely disposed at thedelivery end of said chamber, certain of said rollers being submerged insaid liquid; means for adjusting said rollers to form a curved passagebetween said rollers; and means for forcing timbers through saidpassage.

3. A wood bending machine, comprising an elongated chamber containing asuitable liquid; a plurality of guide rollers oppositely disposed at thedelivery end of said chamber, certain of said rollers being submerged insaid liquid; means for adjusting said rollers to form a curved passagebetween said rollers; a plurality of feed rollers disposed in front ofsaid guide rollers and having roughened gripping surfaces; and a drivingmechanism for rotating said feed rollers to force the timbers throughsaid passage.

4. A wood bending machine, comprising an elongated chamber containing asuitable liquid; a plurality of guide rollers oppositely disposed at thedelivery end of said chamber, certain of saidrollers being submerged insaid liquid; means for adjusting said rollers to form a curved passagebetween said rollers; a plurality of feed rollers disposed in front ofand in line with the said passage to form an extension thereof, saidrollers having longitudinally disposed corrugations formed in theirouter surface; and a driving mechanism embodying one of said rollers forforcing the said timbers through the said passage.

5. A wood bending machine, comprising an elongated chamber containing asuitable liquid; a plurality of guide rollers oppositely disposed at thedelivery end of said chamber, certain of said rollers being submerged insaid liquid; a plurality of vertically adjusted bearing boxes for saidguide rollers; a plurality of feeding screws movably engaglng said boxesand adapted to adjust the same to form a curved passage between saidrollers; a plurality of feed rollers disposed in front of said guiderollers and having roughened gripping surfaces; and a driving mechanismfor rotating said feed rollers to force the timbers through passage.

6. A wood bending machine, comprising an elongated receiving chambercontaining a suitable liquid and having an inlet passage at the endthereof; a plurality of guide rollers oppositely disposed at thedelivery end of said chamber, certain of said rollers being submerged insaid liquid; a plurality of feed rollers disposed in front of said guiderollers and having roughened gripping surfaces; and a driving mechanismfor rotating said feed rollers to force the timbers through saidpassage.

In testimony whereof we have signed thls specification in the presenceof two subscribing witnesses.

MANUEL S. ESPINOSA ANDUAGA. HENRI BOURRELLY.

Witnesses SAMUEL NALooN, CARLOS SANcnEz.

